I am planning to use this configuration for deer hunting this year. I am wanting to zero for a hundred yards but the scope only has a maximum of 4 power, I am not able to get a very tight group so I was hoping someone could give me a good proven method that will save me some ammo down range.6.8 ammo is about a dollar or so a round. I am familiar with the 300 yard military method, but with the sbr I want to have a little tighter group of tolerances. Note: I am not able to make any shots further than 300 to 400 yards, if you are concerned about the SBR.